Ammeter power supply circuit and ammeter

A technology of power supply circuit and voltage regulation circuit, applied in electrical components, regulating electrical variables, instruments, etc., can solve the problems of wide voltage regulation range and the inability of linear power supply to convert power.

Pending Publication Date: 2020-06-19
深圳龙电华鑫控股集团股份有限公司
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a power supply circuit for electric meters, which aims to solve the prob...

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  • Ammeter power supply circuit and ammeter
  • Ammeter power supply circuit and ammeter
  • Ammeter power supply circuit and ammeter

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Embodiment Construction

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0038] The first aspect of the embodiments of the present invention provides a power supply circuit for...

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Abstract

The invention provides an ammeter power supply circuit and an ammeter. The ammeter power supply circuit comprises a rectification filter circuit, a voltage regulating circuit, a high-frequency transformer, an output rectification circuit, an output filter circuit and a voltage feedback circuit. The voltage regulating circuit regulates the voltage of a high-voltage direct-current power supply according to a voltage regulating signal and outputs the regulated voltage to the high-frequency transformer; the high-frequency frequency converter carries out voltage reduction conversion on the high-voltage direct-current power supply after voltage regulation; a second high-frequency voltage pulse signal is output through a second secondary coil; the output rectification circuit rectifies a second high-frequency low-voltage pulse signal and then outputs the second high-frequency low-voltage pulse signal to the output filter circuit; the output filter circuit filters the rectified second high-frequency low-voltage pulse signal, low-voltage direct current is obtained and outputted, the voltage regulating circuit regulates the magnitude of the high-frequency voltage pulse signal output by the transformer according to the magnitude of the voltage outputted by the output rectification circuit, the conversion power is high, and when the input voltage changes, it is guaranteed that the output voltage is stable such that the voltage stabilizing range is widened.

Description

technical field [0001] The invention belongs to the technical field of electric meters, and in particular relates to a power supply circuit of electric meters and electric meters. Background technique [0002] As the functions of smart meters continue to increase, the increasingly developed communication methods are also rapidly applied to smart meters, including GPRS communication, carrier communication, wireless WIFI communication, Ethernet communication, optical fiber communication and so on. Among them, GPRS communication, wireless WFIF communication, Ethernet communication, etc. all have high requirements on the power and stability of the power supply. The traditional linear power supply cannot meet the requirements of high conversion power and wide voltage regulation range. Contents of the invention [0003] The purpose of the present invention is to provide a power supply circuit for an electric meter, aiming at solving the problem that the traditional linear power ...

Claims

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Application Information

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IPC IPC(8): H02M7/04H02M3/335H02M1/092
CPCH02M1/092H02M3/33523H02M7/04
Inventor 蒋俊萍汪俊
Owner 深圳龙电华鑫控股集团股份有限公司
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